A variable declared but the value is not assigned that is called undefined property.
Code:-
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script>
/*
The variable is declared but not initialized, then it returne undefined
*/
function cal_fun()
{
var test;
alert(test);
}
</script>
</head>
<body>
<h2>undefined</h2>
<button onclick="cal_fun();">Get Value</button>
</body>
</html>
Undefined example:- JavaScript
Reviewed by Network security
on
November 11, 2019
Rating:
Reviewed by Network security
on
November 11, 2019
Rating:
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